I'm having similar problem, mine has never died out. I'm also looking for answers... . At idle it idles rough to point my truck it shakes head rest on seats, and if you bring it to about 900rpm it gets worse, and if you go to1000 rpm or higher it feels nice and smooth. Full power no loss. have not had anything checked yet has done this since I bought it 9/2011 have banks IQ did it before I installed it. 06' megacab 4x4 5. 9 auto. #@$%!
Hey Trino, did you ever find a solution to this? Do you have an aftermarket fuel pump like the FASS pump?